Speed Survey

A Speed survey is carried out usually for the purpose of determining the level of vision required at the point of contact of two roads or access points or as part of the design process for a new road or junction.

Speed surveys are also used in the evaluation of traffic calming schemes, in a before and after situation, and in relation to a safety examination of the local road network.

Often speed surveys are carried out to either validate or rebut the concerns of third parties, as for example in the context of a planning application or appeal.

Radar speed surveys are carried out in accordance with a Department of Transport standard and dependent on the purpose of the survey are then presented as average or 85th percentile values. In highway design and particularly junction assessment the higher 85th percentile value is always used and “wet weather speeds”, which are lower than dry are used. If the survey is undertaken in dry weather conditions the 85th percentile value is translated by use of computer software to a “wet weather” value.

Speed surveys can be carried out either manually by hand held device or by tubes laid across the road known in the profession as 'automatic traffic counters' (ATC's). Manual traffic counts have the benefit of providing more precise details of the circumstances of the local highway, such as weather conditions, constraints to free flow conditions, high speed emergency vehicles, and by noting and removing 'platoons' of traffic from the survey. ATC’s are in place for a full 24 hour, seven day period and thus a greater range of results and traffic flows is obtained. However because of their nature they will not take into account the factors which an operator would record as part of the manual survey.

Sanderson Associates have extensive experience in providing speed surveys using both means, with our “in house” Genesis Handheld Directional Radar or Laser Speed Guns used for manual collection.

Speed surveys can be carried out as part of access feasibility investigations or as part of a Transport Statement or Transport Assessment. In addition they are often carried out for more simple planning proposals where the suitability of an existing or new access is brought into question by the Local Planning or Highway Authority.

In addition to undertaking the survey Sanderson Associates have in house transport and design engineers who are able to determine design requirements from the results and to comment on layouts and seek to provide amendments, where possible, which move to compliance with the required standard.

Require Assistance with a Speed Survey?

Sanderson Associates have extensive experience in assisting our Clients with Speed Surveys relating to Highway Planning Matters for a wide variety of major and minor developments throughout the whole of the UK, Isle of Man and Ireland.

We would welcome the opportunity to provide you with a competitive fee proposal, simply call Sanderson Associates on 01924 844080 and ask to speak to a member of our Design Team or click here to complete our secure online form.


What our Clients' say:

Advice on Site Drainage

Wed 22 June 2016

We consulted Sanderson Associates with regard to a surface water drainage design issue that we had recently. They were prompt in their response to us and were able to cut right through to the heart of the problem and provide advice that was direct and uncomplicated. The information provided satisfied the requirements of the local […]

Highway Advice – Testimonial

Mon 9 May 2016

Bob came to the island as an, ‘expert witness’, in a Planning Appeal, for a sizeable property build, essentially covering the Highway issues. After meeting Bob the day before the Appeal, it was abundantly clear this chap, ‘knew his stuff’. His consummate professionalism, experience and knowledge came though at the Hearing, contributing to the process […]

Transport Report in Opposition to Proposed Large Scale Housing

Tue 5 April 2016

We commissioned a Transport Report from Sanderson’s in opposition to a proposed large scale housing development near us. Ian Ladbrooke provided professional expertise in identifying the transport issues and the flaws in the developer’s transport assessment. His input proved invaluable and ultimately the application was refused on transport grounds. The report was delivered on time […]

Swept Path Analysis, Proposed Extension to Industrial Development

Mon 7 December 2015

As an independent property developer I was asked for a swept path analysis to aid my planning application. I googled and found Sanderson Associates, never had I heard of them before. I have to say from the start they were extremely professional and very prompt. I asked for many amendments on my analysis at the […]

Residential Development and Agricultural Access

Wed 16 September 2015

In my work as a planning consultant, I have come across a number of intransigent highway officers. Engaging Sandersons has allowed me to overcome these problems and secure planning consent for some difficult sites. They offer efficient and professional service which I can thoroughly recommend. Adrian Rose, Rose Consulting

Swept Path Analysis – Residential Development

Wed 5 August 2015

 Many thanks for the final swept path analysis drawings. Can I also say that its been a pleasure, and we will definitely use your services again on future projects. Richard On behalf of C E Gilbert & Son Developments Ltd

Swept Path Analysis

Mon 27 July 2015

We are a small civil engineering consultancy mainly involved in the design of housing developments. We often require swept-path analysis in order to satisfy local councils that their vehicles will be able to access the development. We send our site plans to Darren at Sanderson Associates who always provides a fast, efficient and consistent service. […]

Planning Appeal Rebuttal, Proposed Residential Property

Mon 13 July 2015

 We initially engaged Sanderson’s to carry out a traffic survey to support a planning application. They were recommended by our architect and their quote was very reasonable compared with other survey companies that we approached. Unfortunately, the initial survey was sabotaged when the monitoring tubes were pulled up by an unknown third party. Sanderson’s recommended […]

Flood Risk Assessment, Residential Development

Mon 15 June 2015

Sanderson Associates has provided us with a very professional service, and has always responded extremely quickly and efficiently to our client’s requirements. Laura Elias, Assistant Planner, CBRE Ltd

CPD Seminar Highway Development Control and Flood Risk

Tue 31 March 2015

I would like to thank the Team at Sandersons for providing CPD Seminars on Highway Development Control and Flood Risk to our Chartered Surveyors. The content of each meeting was both relevant and informative and gave useful, practical guidance on each topic. It is clear that Sandersons have a wealth of knowledge and expertise in […]

Speed Survey, Speed Surveys, Surveys, Level of Vision, Traffic Calming Schemes85th Percentile Values, Wet Weather Speeds, Traffic Flows, Transport Assessment Transport Statement, Local Planning, Highway Authority